Journal article (1996) - K Werner (author), A.J. Storm (author), T Zijlstra (author), S Radelaar (author), S Butzke (author), JWH Maes (author), M van Rooy (author), P.F.A. Alkemade (author), E Algra (author), MAJ Somers (author), BGM de Lange (author), E.W.J.M. van der Drift (author)